Ok, take a look at those!
1. Navagio (shipwreck) beach on Zante
http://www.stefaniahotel.com/zakynthos/zakynthos.jpg
http://www.zakynthos-net.gr/all/beaches/navagio.jpg
2. Santorini
http://zervonikolakis.lastros.net/jeffrey.files/image003.jpg
http://www.freestuff.gr/postcards/albums/userpics/21120/nr_santorini.jpg
3. Mykonos
http://www.teleiosgamos.gr/photos/20060601145120Myk_2_a.jpg
http://www.nel.gr/media/images/Island_Photos/Mikonos/Myk2956A.jpg
4. The Acropolis/The Parthenon
http://img.search.com/thumb/3/35/Ac.parthenon5.jpg/300px-Ac.parthenon5.jpg
http://67.18.47.148/com/index/at/site/images/sfetel_pic_parthenon.jpg
5. Sounio
http://www.apodimos.com/images/Image130.gif
6. Corfu
http://www.holiday.gr/places_images/265/32.jpg
http://www.wcl.ee.upatras.gr/ph_gr/gr_34.jpg
http://www.spitiprifti.gr/images/corfu_liston.jpg
7. Thessaloniki
http://uranus.ee.auth.gr/new/images/thessaloniki.jpg
http://staff.science.uva.nl/~anoulas/thessaloniki.jpg
http://upload.wikimedia.org/wikipedia/commons/thumb/2/21/Looking_down_at_Aristotelous_Sq_Thessaloniki_2005.jpg/800px-Looking_down_at_Aristotelous_Sq_Thessaloniki_2005.jpg
You can find a lot more here:
http://www.planetware.com/pictures/greece-gr.htm
http://www.picturesofplaces.com/Europe/greece.html